1263544125803 has 2 divisors, whose sum is σ = 1263544125804. Its totient is φ = 1263544125802.

The previous prime is 1263544125703. The next prime is 1263544125821. The reversal of 1263544125803 is 3085214453621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263544125803 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1263544125853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631772062901 + 631772062902.

It is an arithmetic number, because the mean of its divisors is an integer number (631772062902).

Almost surely, 2^{1263544125803} is an apocalyptic number.

1263544125803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263544125803 is an equidigital number, since it uses as much as digits as its factorization.

1263544125803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 1263544125803 in words is "one trillion, two hundred sixty-three billion, five hundred forty-four million, one hundred twenty-five thousand, eight hundred three".